/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:31:59,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:31:59,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:31:59,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:31:59,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:31:59,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:31:59,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:31:59,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:31:59,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:31:59,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:31:59,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:31:59,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:31:59,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:31:59,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:31:59,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:31:59,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:31:59,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:31:59,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:31:59,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:31:59,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:31:59,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:31:59,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:31:59,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:31:59,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:31:59,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:31:59,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:31:59,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:31:59,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:31:59,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:31:59,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:31:59,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:31:59,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:31:59,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:31:59,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:31:59,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:31:59,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:31:59,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:31:59,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:31:59,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:31:59,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:31:59,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:31:59,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:31:59,264 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:31:59,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:31:59,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:31:59,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:31:59,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:31:59,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:31:59,266 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:31:59,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:31:59,266 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:31:59,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:31:59,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:31:59,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:31:59,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:31:59,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:31:59,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:31:59,269 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:31:59,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:31:59,269 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:31:59,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:31:59,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:31:59,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:31:59,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:31:59,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:31:59,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:31:59,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:31:59,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:31:59,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:31:59,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:31:59,444 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:31:59,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label47.c [2023-04-01 10:32:00,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:32:01,019 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:32:01,019 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label47.c [2023-04-01 10:32:01,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8391de2e6/0bfb246320f94b42b24bac9d0f0b9dfb/FLAGc9e890f98 [2023-04-01 10:32:01,063 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8391de2e6/0bfb246320f94b42b24bac9d0f0b9dfb [2023-04-01 10:32:01,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:32:01,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:32:01,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:32:01,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:32:01,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:32:01,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:01,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52239ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01, skipping insertion in model container [2023-04-01 10:32:01,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:01,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:32:01,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:32:01,313 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label47.c[6157,6170] [2023-04-01 10:32:01,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:32:01,739 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:32:01,759 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label47.c[6157,6170] [2023-04-01 10:32:01,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:32:01,977 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:32:01,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01 WrapperNode [2023-04-01 10:32:01,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:32:01,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:32:01,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:32:01,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:32:01,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:01,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,130 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:32:02,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:32:02,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:32:02,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:32:02,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (1/1) ... [2023-04-01 10:32:02,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:32:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:32:02,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:32:02,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:32:02,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:32:02,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:32:02,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:32:02,209 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:32:02,209 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:32:02,210 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:32:02,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:32:02,210 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:32:02,210 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:32:02,210 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:32:02,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:32:02,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:32:02,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:32:02,308 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:32:02,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:32:04,353 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:32:10,180 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:32:10,180 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:32:10,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:10 BoogieIcfgContainer [2023-04-01 10:32:10,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:32:10,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:32:10,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:32:10,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:32:10,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:32:01" (1/3) ... [2023-04-01 10:32:10,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b231363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:10, skipping insertion in model container [2023-04-01 10:32:10,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:01" (2/3) ... [2023-04-01 10:32:10,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b231363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:10, skipping insertion in model container [2023-04-01 10:32:10,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:10" (3/3) ... [2023-04-01 10:32:10,190 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label47.c [2023-04-01 10:32:10,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:32:10,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:32:10,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:32:10,241 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c988ab6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:32:10,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:32:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:32:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:32:10,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:32:10,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:32:10,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:32:10,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:32:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 314328931, now seen corresponding path program 1 times [2023-04-01 10:32:10,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:32:10,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369101189] [2023-04-01 10:32:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:32:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:32:10,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:32:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369101189] [2023-04-01 10:32:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369101189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:32:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:32:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:32:10,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114722493] [2023-04-01 10:32:10,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:32:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:32:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:32:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:32:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:32:10,481 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:32:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:32:12,325 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:32:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:32:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:32:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:32:12,339 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:32:12,339 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:32:12,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:32:12,345 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 482 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:32:12,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 70 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:32:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:32:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890. [2023-04-01 10:32:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 876 states have (on average 1.9429223744292237) internal successors, (1702), 876 states have internal predecessors, (1702), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 10:32:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions. [2023-04-01 10:32:12,396 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11 [2023-04-01 10:32:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:32:12,396 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions. [2023-04-01 10:32:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:32:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions. [2023-04-01 10:32:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:32:12,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:32:12,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:32:12,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:32:12,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:32:12,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:32:12,399 INFO L85 PathProgramCache]: Analyzing trace with hash -643549611, now seen corresponding path program 1 times [2023-04-01 10:32:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:32:12,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131730243] [2023-04-01 10:32:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:12,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:32:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:32:12,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:32:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131730243] [2023-04-01 10:32:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131730243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:32:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:32:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:32:12,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161000263] [2023-04-01 10:32:12,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:32:12,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:32:12,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:32:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:32:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:32:12,526 INFO L87 Difference]: Start difference. First operand 890 states and 1719 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:32:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:32:15,189 INFO L93 Difference]: Finished difference Result 2709 states and 5256 transitions. [2023-04-01 10:32:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:32:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-04-01 10:32:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:32:15,199 INFO L225 Difference]: With dead ends: 2709 [2023-04-01 10:32:15,199 INFO L226 Difference]: Without dead ends: 1824 [2023-04-01 10:32:15,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:32:15,202 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1553 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:32:15,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 91 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2836 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 10:32:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2023-04-01 10:32:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1587. [2023-04-01 10:32:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1556 states have (on average 1.6625964010282777) internal successors, (2587), 1561 states have internal predecessors, (2587), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (48), 15 states have call predecessors, (48), 9 states have call successors, (48) [2023-04-01 10:32:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2645 transitions. [2023-04-01 10:32:15,300 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2645 transitions. Word has length 26 [2023-04-01 10:32:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:32:15,400 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2645 transitions. [2023-04-01 10:32:15,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:32:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2645 transitions. [2023-04-01 10:32:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 10:32:15,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:32:15,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:32:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:32:15,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:32:15,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:32:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash 377328398, now seen corresponding path program 1 times [2023-04-01 10:32:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:32:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533283912] [2023-04-01 10:32:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:32:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:32:15,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:32:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533283912] [2023-04-01 10:32:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533283912] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:32:15,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15727053] [2023-04-01 10:32:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:15,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:32:15,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:32:15,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:32:15,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:32:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:15,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:32:15,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:32:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:32:15,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:32:15,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15727053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:32:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:32:15,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:32:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13334630] [2023-04-01 10:32:15,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:32:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:32:15,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:32:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:32:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:32:15,762 INFO L87 Difference]: Start difference. First operand 1587 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:32:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:32:17,889 INFO L93 Difference]: Finished difference Result 4838 states and 8232 transitions. [2023-04-01 10:32:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:32:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2023-04-01 10:32:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:32:17,908 INFO L225 Difference]: With dead ends: 4838 [2023-04-01 10:32:17,909 INFO L226 Difference]: Without dead ends: 3256 [2023-04-01 10:32:17,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:32:17,915 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1612 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:32:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 59 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 10:32:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2023-04-01 10:32:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2572. [2023-04-01 10:32:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2502 states have (on average 1.4548361310951239) internal successors, (3640), 2523 states have internal predecessors, (3640), 15 states have call successors, (15), 15 states have call predecessors, (15), 54 states have return successors, (182), 33 states have call predecessors, (182), 14 states have call successors, (182) [2023-04-01 10:32:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3837 transitions. [2023-04-01 10:32:17,999 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3837 transitions. Word has length 36 [2023-04-01 10:32:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:32:18,000 INFO L495 AbstractCegarLoop]: Abstraction has 2572 states and 3837 transitions. [2023-04-01 10:32:18,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:32:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3837 transitions. [2023-04-01 10:32:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 10:32:18,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:32:18,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:32:18,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:32:18,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:32:18,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:32:18,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:32:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1013555716, now seen corresponding path program 1 times [2023-04-01 10:32:18,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:32:18,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831226554] [2023-04-01 10:32:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:18,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:32:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 10:32:18,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:32:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831226554] [2023-04-01 10:32:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831226554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:32:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706113752] [2023-04-01 10:32:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:32:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:32:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:32:18,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:32:18,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:32:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:32:18,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:32:18,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:32:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:32:18,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:32:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 10:32:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706113752] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:32:18,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914536229] [2023-04-01 10:32:18,758 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 10:32:18,758 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:32:18,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:32:18,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:32:18,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:32:18,973 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:32:19,300 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2023-04-01 10:32:20,295 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 10:32:20,356 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 20152 conjuctions. This might take some time... [2023-04-01 10:32:24,916 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2728 conjuctions. [2023-04-01 10:32:52,841 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6820 conjuctions. This might take some time... [2023-04-01 10:32:55,750 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 6820 conjuctions.